Going after primal beasts is one of many things we're assigned to do. My mission at that time wasn't directly related to them, but ended up involving them.

[This is all such confidential info, but...eh. The Society's a wreck back home anyway.]

They all were under control at some point, yeah. But that was long before us, and most have since become dormant. That said, some primal beasts become volatile when they reawaken. They need to be dealt with before they bring harm to nearby populations.